If you're a serious reloader, you need a good caliper, or far better, a good digital micrometer. Calipers only measure to .001 inch. Micrometers measure to .0001.
You also need Wilson type case guages in each caliber you reload. Especially if you load in volume on a progressive. It's a small investment, and they last a lifetime. The case guages can be purchased one at a time, spreading the expense out over a long poeriod.
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If you think a mighty military force is expensive, wait 'til you see what a weak one costs.
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